<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<button type="button" onclick="five()">循环5次弹窗</button>
<script>
    /**
     * 4.点击按钮连续弹窗5次
     <div class="toggle">
     <button type=”button”>循环5次弹窗</button>
     </div>
     */

    function five() {
        for (var i = 0; i < 5; i++) {
            alert("这是第" + (i+1) + "次弹窗！");
        }
    }
</script>
</body>
</html>